A primary key (pkey) is an attribute (column) in a table that serves a special purpose. The data items that make up this attribute are unique; no two data item values are the same. The pkey value serves to uniquely identify each row in the table.
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Definition/Theory (Class Summary)
A primary key (pkey) is an attribute (column) in a table that serves a special purpose. The data items that make up this attribute are unique; no two data item values are the same. The pkey value serves to uniquely identify each row in the table.
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Exam questions or things to think about Social and Ethical Issues
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Examples or Activities